Columns

- Refactored column objects to contain a ::validate method, for the
  validation of incoming data.
- Context.columns is now a vector of one of each column object,
  indexed by attribute name, for validation purposes.

src/columns/ColStart.cpp

@@ -37,8 +37,8 @@ extern Context context;
 ////////////////////////////////////////////////////////////////////////////////
 ColumnStart::ColumnStart ()
 {
-  _label     = STRING_COLUMN_LABEL_STARTED;
-  _attribute = "start";
+  _name  = "start";
+  _label = STRING_COLUMN_LABEL_STARTED;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -46,6 +46,12 @@ ColumnStart::~ColumnStart ()
 {
 }
 
+////////////////////////////////////////////////////////////////////////////////
+bool ColumnStart::validate (std::string& value)
+{
+  return ColumnDate::validate (value);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Overriden so that style <----> label are linked.
 // Note that you can not determine which gets called first.
@@ -63,7 +69,7 @@ void ColumnStart::measure (Task& task, int& minimum, int& maximum)
 {
   minimum = maximum = 0;
 
-  if (task.has (_attribute))
+  if (task.has (_name))
   {
     if (_style == "active")
     {
@@ -82,7 +88,7 @@ void ColumnStart::render (
   int width,
   Color& color)
 {
-  if (task.has (_attribute))
+  if (task.has (_name))
   {
     if (_style == "active")
     {